Added to Microsoft Office 2007 Guides page:
Printable "Cheat Sheets".
Custom guide has released printable PDF guides for many popular applications, inclusing Office 2007 - you can access them all here:
Added to the PDF Tools page:
Embed or Link to PDFs easily
If you want someone else to read a PDF easily then you can upload it to Google Docs so they can read it on any piece of on-line enabled hardware, without having to have a PDF reader installed.
If the PDF is already hosted online somewhere else then you can use Google's Embeddable Document viewer to allow your recipient(s) to view the PDF document online easily. This also works with Power Points presentations that have been uploaded somewhere!
Added to the Presentation Tools page: